Harrow



UNITED STATES PATENT Orricn.

ALBERT WILCOX, OF CEDAR RAPIDS, IOWVA.

HARROW.

SPECIFICATION forming part of Letters Patent No. 331,353, dated December 1, 1885. Application filed November 17, 1884. Serial No. 148,109. (N 0 model.)

To all whom it may concern.-

Be it known that I, ALBERT WILoox, a citizen of the United States, residing at Cedar Rapids, in the county of Linn and State of Iowa, have invented certain new and useful Improvements in Harrows, of which the following is a specification.

This invention relates to harrows having adjustable teeth; and my object is to effect a change in the angle of the teeth with respect to the frame by the use of simple, cheap, and reliable means, and such as may be applied to the frame of any ordinary harrow.

The invention consists in a harrowtooth having a hook at its upper end, by means of which it is suspended and is free to oscillate on a pivot in a socket formed in or attached to the frame, the top and end of which socket serve as stops for the tooth in its terminal positions by the contact of the hook and of the body of the tooth, respectively.

It also consists in a cap or socket which may be attached to the frame, and in the combination and arrangement of the parts, as will be hereinafter described.

In the accompanying drawings, Figure 1 represents a side elevation of the invention as applied to a simple iron harrow-frame; Fig. 2, a view of the socket from the inner side with tooth attached; Fig. 3, a vertical crosssection of Fig. 1; Fig. 4, asimilar view of the invention applied to a wood frame; Fig. 5, the same with angle-iron frame; Fig. 6, a plan View thereof from the bottom, and Fig. 7 the cap adapted to said angle-iron frame.

Similar letters of reference indicate corresponding parts.

The tooth A is bent or otherwise formed into a hook at its upper end, the terminus thereof being preferably less than a right angle to the body of the tooth, so that being pivoted near the corner of a right-angular socket the tooth will be free to vibrate a limited distance, as will be seen by reference to Fig. 2. WVhen the tooth is at right angles to the frame, the body of the tooth or bears against the end of the socket b, and at the other extreme position the hook or shoulder a strikes the top of the socket Z),

tooth, being loosely suspended on the pivot 0, assumes the respective positions indicated,

as indicated by the dotted lines. The

according as the draft is applied to the one side or the other of the frame, and the barrow is thereby adapted to various conditions of soil. The socket B may be formed in the beam itself, beinga mortise nearly square in longitudinal section and wide enough to admit the head of the tooth freely; but to avoid the weakening of the beam which this would cause, and also to admit of the tooth being applied to any frame, whether of wood or iron, and, still further, to reduce the cost of manufacture, I prefer in practice to provide the tooth with a removable cap or socket adapted to be attached to the side of the frame D, as represented. Where the nature of the case'admits, I prefer to use the pivot O as a bolt for fastening the cap to the frame; but where it is not desirable to make a hole in the frame the pivot may be integral with the cap, and the latter may be secured to the frame by a clip or clips. To prevent the cap from turning when applied to a frame having a plane side, the upper side, I), may be extended beyond the other sides and project over the top of the frame. In the same manner lugs 12 b may extend from the lower end of the sides I) b and pass under the frame, affording a double bearing, as shown in Fig. 3. In order to allow the pivot-bolt to pass through the middle of the beam when of wood, and at the same time adapt the cap to the difference in width of the wood and iron frame, the retaining-flange may project from an offset in the cap, as shown in Fig. 4. The lug Z) also may be a spur adapted to pierce the wood under the pressure of the fastening-bolt or enter holes in the side of the frame.

In applying the cap to an angle-iron frame the upper flange, b, may be dispensed with,

the horizontal flange D of the angle-iron serving as the head of the socket and to prevent the cap from turning.

To prevent the movement of the tooth from wearing the frame when of wood, a metal shim is interposed, as shown in Fig. 4, or this side of the socket may be integral with the rest.

Owing to its simplicity, the device above described is easily, rapidly, and cheaply made, and being strong and durable, as well as neat in appearance and effective in operation, I

regard it as a useful improvement in harrows. Its form is such as to admit of sufficient strengthwith light material, and the operative parts, being'inclosed on all sides except the bottom, are well protected from the weather and consequent rust.

Having thus described my invention,what I claim as new, and desire to secure by Letters Patent, is-

" ing a hook or angle at the upper end, a socket in or at one side of the frame adapted to allow the tooth to oscillate a short distance in the plane of its curvature and furnish at one end a stop for the body of the tooth and at thetop a stop for the hook portion, respectively, and a pivot upon which the tooth is suspended by said hook, substantially as specified.

3. In combination with a tooth having a hook oran'gle formed at its upper end, a socket therefor made by securing to an angle-bar frame a stirrup -shaped cap by means of a single bolt adapted to serve as a pivot for the tooth, the socket so formed having an end bearing for the body of the tooth and a top bearing for the hook portion, according to the relative position of the tooth, substantially as described.

In testimony whereof I affix my signature in presence of two witnesses.

ALBERT \VILCOX'.

\Vitnesses:

FRANK G. CLARK, S. G. ARMSTRONG. 

